# AnnotationType enum

Namespace: [Rhino.Geometry](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.geometry.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public enum AnnotationType
```

ON::AnnotationType identifies the type of an annotation object derived from ON_Annotation.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Unset | 0 | Not a valid annotation type. |
| Aligned | 1 | Linear distance between two points with dimension line parallel to the dimensioned points. |
| Angular | 2 | Angle between two lines. |
| Diameter | 3 | Arc or circle diameter dimension. |
| Radius | 4 | Arc or circle radius dimension. |
| Rotated | 5 | Linear distance between two points with dimension line horizontal, vertical or rotated by a specified amount. |
| Ordinate | 6 | Ordinate dimension. Typically used to document an offset distance between the center of a circle and a reference point. |
| ArcLen | 7 | Arc length of a curve. |
| CenterMark | 8 | Center mark dimension. Typically used to document the center of an arc or circle. |
| Text | 9 | Text. Stand alone text with a wide variety of uses. |
| Leader | 10 | Leader. Text and a curve with an arrow head. |
| Angular3pt | 11 | Angular3pt. Angle defined by 3 points. |